And just the doubling of frequenty nothing else. If you multiplicate a random signal with itself you get, for every frequenty in the original signal, a frequenty that is twice that of the original frequenty. Not to resynthesize the sound, although that is a very interesting idea to. I was just thinking of a very sofisticated distortion pluginn. So if you want to alter basic harmonic balance of one tone you need to uhm REsynthesize it to be able to extract "basic" harmonics and manipulate them. Every single tone of these instruments contains a LOT of harmonics already and that's what defines colour of instrument - just look any single tone on anal-yzer. Heh idea is great but unfortunately it's can of worms too - it is simple for series of sine tones cause they're pure basic harmonics themself ,but guitar ,violin ,voice etc are not simple sinuses. Huh sorry if i missed the point but one thing leads to another etc ,this is actually very deep subject - i'd like to hear more about this too Heh just look where're we today - we're not moving forward at all. I remember some talk in some magasine ( i think it was Keyboards) 10 years ago or smth about (now dead) Oberheim company presenting resynthesis concept of digital recording - their idea is that every sound contains fixed number of sine tones + noise and that resynthesis is the only way to capture and reproduce perfect recording and that PCM AD/DA conversion is bullshit but computers are not fast enough for that. The only piece of gear i know that does smth similar is Symbolic Sound Kyma - there're some vst synths trying to do that but i endup getting awfull sounding cheapo vocoder sounding results with them
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